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About Cosworth CNC Ported Big Valve Cylinder Heads

For over 40 years, Cosworth has been the leader in innovative multi-valve cylinder head design for both racing and high performance production cars. The Cosworth CNC Ported Big Valve Cylinder head range is the latest advancement.

Each original cylinder head design is carefully evaluated and tested to establish the improvements required to meet the target performance level. Hours of testing and flow bench validation are used to determine the best advanced port design yielding maximum usable power and response. However, there is more to cylinder head design than just maximum flow.

It is critical that port velocity is maintained to ensure drivability and valve train components are matched to guarantee reliable performance. Once all of these factors have been tested and validated, the final port contour is digitized. Using the digitized program, we then reshape both intake and exhaust ports using a 5 axis CNC mill producing an accurate and consistent port shape every time.

In addition to re-shaping and enlarging the intake and exhaust ports, most Big Valve Cylinder heads feature a re-shaped combustion chamber to unshroud the valves increasing air flow and performance. After machining, each cylinder head receives a multi-angle high performance valve job on our precision CNC valve seat cutter.

Then each cylinder head is ultrasonically cleaned, serialized and finally hand assembled with select high performance valve train components, ready to install on your engine.

All new OE Castings

Enlarged intake and exhaust ports

Large diameter stainless steel intake valves

Large diameter inconel exhaust valves

Hi-rev, dual valve springs

Titanium retainers

Hardened steel spring platforms

Reshaped combustion chamber on most applications

Flow bench proven design

Dynamometer tested

Machined Cosworth logo

Precision multi-angle valve job

Pre-assembled, ready to install

Machined port bore finish

Knife edge port divider

About Cosworth

Cosworth has been at the forefront of motorsport activity for over 50 years and is a brand synonymous with success. Cosworth continues to develop and supply exciting powertrain and electronics products for use at all levels of the sport, from class leading 'off the shelf' products at clubman level, through to bespoke 'state of the art' developments for the pinnacle of the sport.

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Cosworth High Performance Parts are designed to deliver optimal performance for a range of the most popular production cars.

For more information regarding this brand and for full price lists and vehicle applications please click the following link -Cosworth

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